This.The Arkham trilogy is a dream come true for someone who grew up watching Batman TAS. Aside from Knight's overreliance on the Batmobile, it's damn near perfection.
Fantastic examples all throughout this thread!
Although I'll say... LOL, a couple of people stretching the definition of "trilogy" and including a random set of 3 games from a given franchise. That's not how it works
Anyway, three trilogies I'm a big fan of are all Street Fighter related trilogies. (Bolded is my favorite within the trilogy).
The CPS-1 trilogy: Street Fighter II
- Street Fighter II: The World Warrior
- Street Fighter II' ("Champion Edition")
- Street Fighter II' Turbo: Hyper Fighting
The CPS-2 trilogy: Street Fighter Zero/Alpha
- Street Fighter Zero
- Street Fighter Zero 2
- Street Fighter Zero 3
The CPS-3 trilogy: Street Fighter III
- Street Fighter III: New Generation
- Street Fighter III: Second Impact ("Giant Attack")
- Street Fighter III: Third Strike
Each time one of these games came out, it represented the absolute pinnacle of the 2D fighting game genre. They hold up, to this day. And I still play all of them, to this day.